Electric whistle-blowing apparatus.



P. 0. MOCAPPREY. ELEGTRIGAWHISTLB BLOWING' APPARATUS.

. ABPLmATIoN FILED 1fms.19, l91s.

Patented Feb. 3, 1914.

' 2 SHEETS-SHEET 1.

WJTNESSES:

v .4 TTORNEY.

V? La? z5 y -BY P. e. MGCAPPRBY.

ELECTRIC WHISTLE BLOWING APPARATUS. l

APPLICATION HLED PEB.19,.1913

Patented Feb. 3, 1914.

v 2 SHEETS-.SHEET 2.

WITNESSES: o INVENTOR.

\ ATTORNEY.

FFICE.

FRANK C. MCCAFFREY, F BURLINGTON, VERMDNT.

ELECTRIC WHISTLE-BLOWING APPARATUS.

Specicatipn of Letters Patent.

Patented Feb. 3, 1914.

Application tiled February 19, 1913. Serial .N o. 749,359. l

To all whom it may concern Be it known that I, FRANK QMCCAEFREY, a citizen of the United States of America, and resident of Burlington, in the county of Chittenden and State of Vermont, have invented certain new and useful Improvements in Electric VVhistle-Blowing Appaf ratuses, of which the following is a full, clear, and exact description. This invention has for its object to prof vide iinproved I neans .for effecting the continuous operation cfa whistle. or other form of signal device, for a predetermined period, and to then throw it out of operati-en A further object of the invention is to cause one circuit to put another vcircuit in action, to advance a solenoid core, and operate a signal connected therewith; and to utilize a retarding device, such as a dash pot to control the movementof said solenoid core.

In the drawings showing one embodiment ot my invention, Figure 1 is an elevation of the apparatus; Fig, 2 is Aa section on line 2 2, Fig. 1; Fig. 3 shows the operating lever for thecore. Fig. 4 shows the tripping levers, and Fig. 5 shows details of .the

dash pot control with the position. l,

The apparatus is shown as principally arranged in a casing 1, on -a shelf 2 in which is suitably supported a coil 3 with which parts in different 'wires 71 and .fr are connected, comprised in a normally clcsed circuit ofthe fire alarm system. When this circuit is opened or interrupted by the turning 'in of an alarm, a lever 4 carrying an armatilre 72 for the coil, is released. The lever 4 swings 'on a pivot'.-} and is connected with a spring 6 that draws the lever 4 awa-y from coil 3 when the circuit ot' thelatter is broken. A second lever 8 connected with a spring 9, is swung on its pivot. 90 toward lever 4 to engage a contact piece 10 on lever 8 with a contact piece 11 on lever 4; when lever 4 is released on opening of the circuit in coil 3 and swung by' its spring 6 against a stop 91. One-terminal wire 7 of an auxiliary circuit is attached tov the lever 4, and whenthis lever is releasedl connecting pieces 10 and-11, the circuit is formed to lever 8. A wire 12 leads `from lever 8 to a solenoid 13, from which a'return wire 73 leads to the source of current for wire 7. The solenoid 13-is provided` with a core 14 slidable therein, normally held out of the coil, and drawn into it when thesoienoid 13 is energized. A t the upper end of core 14 is shown a hook 15 connected with a plate' 23 and a .springl 22 around the hook holding the plate 23 away from the 'end of the core frame 92 to provide a 'yielding connection between the core and Ithe hook.

As shownin 3, a cable 16 connects hook 15 with one end of a' lever 17 pivoted at 18, and having its other end connected by the apparatus.y y'This spring and lever serve to hold the core in the position shown and `to retract it when in the coil 13. A cable 20 connects lever 17 with an arm 21 of a suitable whistle or other desired form of signal devicev,that will sound For' operate as long as lever? is held depressed by the core 14. Att-ached to the lower end of the core v14 is a beveled biock 24 so that when the core is drawn downward, at the limit of its movement it, will strike the beveled end of a lever 26. The latter has a shoulder 94 normally engaging a shoulderv 95 on a lever 27 and is held in thisfposition by a spring 28, 80

and the lever 27 has a. spring 29 that will pull it downward when the block 24 shifts. lever 26. As lever 27l is thus drawn down?l ward when released from lever 26, it engagesfa hookl 31 fast to a slide 32, that is connected 'with la lever 33 swinging on a xed pivot 30. A link 34 connects lever 33 with a lever 35 to pull the latter downward `upon depression of lever 21 as described. A

block 36 is suit-ably supported-'to slide `and is connected with' lever 35. This block has an inclined face 37 which contacts with a 'similar inclined face 38 on the said lever 8, whereby when the block 36 is drawn downward by said levers this lever 8 will be swung against the pull of its spring 9, causy ing a separation of the Contact pieces 10 and 11, thereby effecting a rapid break of the circuit for the coil 13, through the4 Wires 7 and 12,.

A swinging latch 39 has a beveled lug 40 .at its lower end which, when the block 36 is drawn downward, will engage a lug 41 carried by the block 36, serving to lockv the block 36 in the depressed position, with the 105 terminals 10 and llseparated'I But when Ithe coi-1 3 is againtenergized and attracts the lever. 4, an\ arm'42 on the lever 4 will .itrike the lever 39 to disengage it from the ug 40, releasingr the block 36.' The latter will be drawn upward by a spring 37 and a spring 74'will cause return of levers 35 and v(i5 a stiff spring 19 wlth a convenient partof 3., and also of the hook 3l Whexrspring 2i) is restored. The resettinga of the lever 2 Within the lever :26 is caused by the engagement oit the block 2st with a lever Llet, connected with lever 27 by a linlr. lo, it beine,l understood that spring 2S) will overbalance springs 74' and 37.

ln order to regulate the return n'lovernent oi" 'the core l/lwhen drawn into the coil 13, l provide a suitable retarding device, suoli ns a dash pot 5.6 having a piston 57 connected by a link with a lover .544. l rod 50 is mounted on one side of the upper end ot the core trarne 92 andJis connected springY i9 to return it when swung; on its airis. The rod '50 has its lower end 5l inclined and projecting sidewise .to engage a beveled luf! 52 carried by a slide 53 that is connected-with the lever 5%. When the core le has been drawn down, and the (circuit is broken by the described means, and the le ver 17 draws the core up'again, the lug '-51 will engage with the lug 52 on the slide 53 to draw the slide upward. This will swing' lever 54C and cause the piston 57 to be drawn out or" the dash pot, thereby creating a re tarding force and causing a slow return of I the core la. Attire latter part of this movement a rod 59 engages a` lever 60 carrying a valve Si normally closing an opening 62 `in` the dash pot, whereby an' is admitted there;

to. beveled lue; 63 on the trarne engages the lun 5l on the rod 50 and swings the latter to release the lug 52 of the slide 53. n sprint; 58 connected with lever 54 is extended when the lever is swung" asjust described, and serves to return the piston 5G and slide to normal position. The rod 5f), Whose head Gel serves 'to swing the lever (if), is adjustably connected 'with the lever by not (i5, so that the lever can be operated at the desired period `in the return of the core.

'lhe operation of the device is as follows: The circuit for the coil 3 is normally closed, but opened when an alarm is turned in. rlhe lever l will, therefore, be normally attracted io disconnect the terminals l() and l1 thereby cutting out the coil 13. 1When the lever t is `released by the coil 3 beingr deenernjized, the circuit is closed for the coil 13. The coil 13 will now draw the core 14, so that the lever 17 will swing the arm for the Whistle-Which it will be understood Will continue to sound until the core lei again returns to normal position. Vilhon the core il reaches the lower limit it will swing levers 33 and ildepressingr block B6, that `,vill shift the lever 8. to break the circuit at the terminals l() and ll, thereby cuttingY out the coil i3. rl'he core 14 is now tree to rise, l^ eing returned by thelspring 19; but this i movement is controlled by the dash pot 56 and its controllinar means `as has been described. Alg-the latter portion et the return with a coil f noeeaee movement of the core the dash p ot and con-A nected parts are restored, and the several levers Will return to normal position. fhe block 24. raises lever Q7 and resets it on shoulder 9i of lover QG. lint it will be un derstood that the lever 8 which has been swungT to break the terminals 1C and il is locked in such position and cannot return until circuit is again established in the coil i3, By this means the Whistle or alarm will continue to sound duringv the entire period in which the core l/l is drawn downward and is retracted under the control of the dash pot. rlhev nent renern'izing of the circuit in the coil. Slwill attract the armature 72 and. lever e against spring 6, and the latch will release block B6 that Will return to normal position through its spring 37, thereby allowing lever 8 also to return to normal poA sition through the inclined faces 37 and 38.

l claim :n

l. The combination in an electric alarm, with a normally closed circuit that is opened .arniaturc and thereby separated from the other When the armature is attracted by the magnet, a spring for shifting the armature to connect said contacts When the circuit broken for 'the 1nagnet,`means controlled said core for sepa-rating said contacts `when the core has beeii'drawn into the solenoid to its limit of movement to permit the core to return to normal position, said means main tainin the circuit for the solenoid oren until t e magnet is again energized.

2. The combination in an electric alarm, with a normally closed circuit that opened to send the signal, of an electroniagnet in said circuit, an armature swung by the inag- .net, a circuit including a solenoid, a core operated by said solenoid, an alarm con-l nected with said core to he operated when the core is drawn into the solenoid 'from normal position, a pair of contacts in the circuit for the solenoid one oir' which is earv ried by said armature and thereby sepa from theother when theV armature tracted by the magnet, a spring for shi'ti the armature to connect said contact-s the circuit is broken for the magnet, means connected with said core for separating said contacts `when the core has been drawn into the solenoid to its limit of movement to per mit the core to return to normal position, said means vmaintaining the circuit tor the solenoid open until the magnet is again energized, and a retarding device orcontrolling the ret-urn movement of the Core.

Ato send the signal, of an electroniagnct inv lill llo

3. The combinationin an electric alarm, with a normally closed circuit that is'opened to send the signal, of an electromagnet in said circuit, an 'armature swung by the magnet, a circuit including a. solenoid, a' core operated by said solenoid, an alarm lconnected with said corelto be operated when the core'is drawn into the solenoid from normal position, a pair of contacts in the cir- 16 cuit for the solenoid, one or" which is carried by said armature and thereby separated from the other when the armature is attracted by the magnet, a spring for shitting the amature to connect said contacts when the circuit 'is broken for the magnet, means controlled by said core for causing a rapid break of'said contacts when the core has been drawn into the solenoid to its limit of movement to permit the core to return to normal 20 position, said means maintaining the circuit for the solenoid open until the magnet is again energized.

4. The combination in an electric alarm,

with a normally closed circuit that is opened 2'5 to send the signal, of an electromagnet in said circuit, an armature swung by the mag-V net, a circuit including a solenoid, a core operated by said solenoid, an alarm connected with said core to be operated when the core a0 is drawn into the solenoid from normal position, a pair of contacts in the circuit for the solenoid one of which is carried by said armature and thereby separated from the other when the armature is attracted by the magnet, a spring for shifting the armature to connect said-contacts when the circuit is broken for the magnet, means controlled by said core for separating said contacts when the core has been drawn into the solenoid to 40 its limit of movement to permit the core to return to normal position, said means maintaining the circuit for the solenoid open until the magnet. is again energized, a re`- tarding device for controlling the return movement of the co're, and means for regulating the movement of the retarding device.

5. lhc combination in an electric alarm,

' with a normally closed circuit that 1E opened to send the signal, of an electromagnet inl ,5o said circuit, an armature swung by the magnet, a circuit including a solenoid, a core operated bysaid solenoid, an alarm connected with said core to be operated 'when the core is drawn into the solenoid vfrom' normal position, a pair of contacts in the cir'- cuit for the solenoid, one of which is carried b said armature and thereby separated from the other when the armature is attracted by the magnet, a spring for shifting the so armature to connect said contact-s when the circuit is broken for the magnet, means controlled by said corev for separating said contacts when the core has been drawn into the solenoid to its limit of movement to permit the core to return to normal position, said means maintainin the circuit for the solenold open until t e magnet 1s again energized, and a connectionbetween the core and the alarm permitting a limited movement under tension.

6. The combination in an electric alarm, with a normally closed circuit that is opened to send the signal, of an electromagnet in said circuit, an armature pivotally mounted to be swung by the magnet, a stop for the armature, a spring for retractin the armature against the stop when the circuit is broken, a swinging lever carrying a contact piece, a slide arranged to swing said lever when advanced, a spring holding said 8o lever against said slide, a Contact piece on the armature arranged to engage said contact piece on the lever in the normal posie tion of the lever when the armature is moved against its stop by its spring, a circuit in* g5 cluding a solenoid that is closed by said contactpieces when engaged, a core operated by said solenoid,v a signal device actuated by said core, means controlled by said core when advanced by its solenoid to shift said slide and swing' the lever to separate the Contact pieces at the limit of movement of the core, thereby permitting the core to re turn .to normal position.

7. The combination in an electric alarm, with a normallyclosed circuit that isopened -to send the signal, ot' an electromagnet in said circuit, an armature pivotally mounted Vto be swung by the magnet, a stop for the armature, a spring for retracting the armature against the stop when the circuit is broken, a swinging lever carrying a Contact piece, a slide arranged to swing said lever when advanced, a spring holding said leveragainst said slide, a Contact picceon the armature arranged to engage said contact piece on the lever inthe normal position otthe lever when the armature is 'moved against its stop by its spring a circuit includinga solenoid that is closed by said contact pieces when engaged, a core operated by said solenoid, a signal device actuated by said core, means controlled by said core when advanced by its solenoid to shift said lslide and swing the lever to separate the contact pieces at' the 'ylimit of movement of the core, thereby permitting the core to return to normal position, and a latch arranged to reta-in the slide in advanced osition until the magnet is again energize 8. The combination in an electric alarm, .A

with a normally closed circuit'that is opened` to send the signal, of an electromagnet in said circuit, anvarmature pivotally mounted to be swung by the magnet, a stop for the armature, a spring for retracting the armature against the stop when the circuit is broken,v a swinging lever carrying a contact piece, a slide arranged to swing' said 130 lever when advanced, a spring holding said lever against said slide, a contact piece on the armature arranged to engage said contact piece on the lever in the normal position ot the lever when the armature v1s moved against its stop by its spring, a cir-4 cuit including a solenoid, that is closed by said contact pieces when engaged, a core oijierated by said solenoid, a signal device actuated by said core, means controlled by said core when advanced by its solenoid to Vshift said slide and swing the lever to separate the contact pieces at the limit of move-v ranged to trip the latch when the armature is again energized.

9. The combination in an electric alarm, with a normally closed circuit that is opened to send the signal, of an electroniagnet in said circuit, an armature pivotally mounted to be swung by the magnet, a stop for the armature, a spring for retraeting the arma ture against the stop when the circuit is broken, a swinging lever carrying a contact piece, a slide arranged to swing said lever when advanced, a spring holding said lever against said slide,l a contact piece on the armature arranged to engage said Contact piece on the lever in the normal position of the lever when the armature is moved against its stop by its spring, a circuit including a solenoid that is closed by said contact pieces when engaged, a core operated by `said solenoid, asignal device actuated by said cere, means controlled by said core when advanced by its solenoid to shift said slide and swing the lever to separate the contact pieces at the limit ot' movement of the core, thereby permitting the core to return to nor inal position, and a latch arranged to retainv the Sli de in advanced position until the magnet is again energized, and an arm on the armature arranged to trip the latch when y the armature is again energized, and a dash pot arranged to regulate the return movenient et the core.

l0. The combination in an electric alarm with a normally closed circuit Which is open to send the signal, of an electromagnet in said circuit, an armature swung by the magnet, a circuit including a solenoid, a core operated by said solenoid for operating an alarm When the core has. been drawn into the solenoid, a lever connected with the cir- .':u'it of the solenoid, a contact on the lever, a contact on the armature, said armature being connected with the circuit for the solenoid whereby the circuit is made and broken by the said contacts on movement of the irma-ture and of the lever, a spring for mov ing the armature away from the magnet, a stopv for the armature, a spring on said lever for moving it toward the armature to engage said contacts, the armature being shifted by the magnet when moved to open said contacts in the normal position of said lever and to close the contacts when the magnet is open to thereby close the circuit of said solenoid, a slide operatively connected With the said core to be shifted at the limit of movement of the core, means connecting the slide and said lever to shift the lever away from position of engagement with the armature Contact, a latch for holding the slide andv lever in said shi ted position, and means connected with thel armature for tripping said latch when. the armature is shifted by attraction troni the magnet.

ll. The combination in an electric alarm of an electroniagnet in the sending circuit, an armature for the magnet, a circuit including a solenoid, a circuit breaker operated by said armature for controlling the solenoid,va core operated by the solenoid for actuating an alarm, a daslipot, a lever controlled by the daslipot piston, a slidable rod connected with said lever, and means connected with said core for engagement With said rod on the return movement otl the core to retard such return movement. A

Signed by ine at Burlington, Vt., in pre ence of two subscribing Witnesses.

' FRANK C. li/IGCAFFREY. Witnesses: i K HORACE L. LooMIs, ETHELBERT SELDEN. 

